DCE

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DCE Assembly Rev2 P560 720px.jpg

Features

  • TTL to RS-232 converter
  • Female DB-9 connector
  • FTDI pinout (reversed directions to directly connect to FTDI Interface)
  • Up to 115,200 baud
  • 49x49mm card
  • 4x 4-40 holes

DCE - RS-232 to TTL

  • The DCE (peripheral) has the female DB-9 connector

DTE DCE.png

  • The DTE (PC) has the male DB-9 connector

H1 Connector

  • Pins signal directions are reversed from an FTDI card
    • Can be directly wired to FTDI connector

Pinout

  1. GND
  2. CTS (out)
  3. VCC (3.3V or 5V)
  4. TX (in)
  5. Rx (out)
  6. RTS (in)

Test Procedure

DCE DTE Test P554 720px.jpg

  • FTDI-49MM
    • 3.3V/5V jumper set to 5V
    • Power cable from FTDI-49MM 5V Connector split to both DCE/DTE cards
  • DCE/DTE Cards
    • 9 pin connectors plugged together
  • FTDI loopback cable
    • TX/RX connected
    • RTSCTS connected
  • USB B cable to PC
  • Run PuTTY
    • 115,200 baud, RTS/CTS
  • Type and it comes back

SP232A Application

SP232A app.PNG

DTE (reference)

  • The DTE (PC) has the male connector

DCE Assembly Sheet